CVE-2026-16380

Published Jul 21, 2026

Last updated 7 hours ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-16380 is identified as a Remote Code Execution (RCE) vulnerability affecting Mozilla Firefox, specifically versions up to 152. This flaw resides within the browser's networking component, where certain manipulations can lead to the execution of arbitrary code. The attack exploiting this vulnerability can be initiated remotely.

Description
Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Source
security@mozilla.org
NVD status
Undergoing Analysis

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity
CRITICAL

Weaknesses

134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-693

Social media

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score

16